File-cutting machine



(No Model.) 4 Sheets$heet 1. H. A. FOSS.

FILE (HITTING MACHINE.

No. 319,218. Patented June 2, 1885.

4 Sheets- (No Model.)

H. A. FOSS.

FILE CUTTING MACHINE.

No. 319,218. Patented June 2,1885.

(No Model.) 4 Sheets-Sheet 3.

H. A. FOSS. 7 FILE (HITTING MACHINE.

No. 319,218. Patented June 2, 1885.

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(No Model.) 4 Sheets-Sheet 4.

H. A. Poss. TILE CUTTING MACHINE.

No. 319,218. Patented June 2, 1885.

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HENRY A. FOSS, OF PHILADELPHIA, PENNSYLVANIA.

FILE-CUTTING MACl-HNE.

SPECIFIG QN forming part of Letters Patent No. 319,218, dated June 2, 1885.

Application filed April 3, 1885. (No model.)

To (tZZ whom it may concern:

Be it known that I, HENRY A. Foss, a citizen of the United States, residing in Phila delphia, Pennsylvania, have invented certain Improvements in File-Cutting Machines, of which the following is a specification.

My invention consists of certain improvements in file-cutting machinery, in which the file-blank travels under a reciprocating cutting-tool.

The main feature of my invention is the feeding of the carriage, to which is attached the file-blank, by a continuous friction feed while the blank is being out.

Other features of my invention relate to the adjusting of the cutter while the machine is in operation, the feeding of the carriage, and also the releasing of the same, as fully described hereinafter.

In the accompanying drawings, Figure 1 is a front elevation of my improved file-cutting machine; Fig. 2, a side elevation, looking in the direction of the arrow, Fig. 1; Fig. 3, a front elevation of part of the machine, with the cutter-head and feed mechanism removed; Fig. 4, a transverse section on the line 1 2, Fig. 1; Fig. 5, a detached section of part of the friction feed mechanism; Fig. 6, a perspective view of parts of the machine detached; Fig. 7, a plan view of the machine; Fig. 8, a detached perspective view of the treadle and operating bars and levers, and Fig. 9 a longitudinal section on the line 8 at, Fig. 7.

I will first describe the mechanism for operating the cutting-tool.

A is the bed of the machine, secured, in the present instance, to a suitable base, a. At the rear of the bed A is a frame, B, also secured to the base and to thebed, Fig. 4. This frame carries the cutter-head E,which is attached to it by set-screws e e, passing through concentric slots in the head and tapped into the frame B, to allow for the adjustment of the head to any angle required.

F is the driving-shaft, which has its bearings in the frame B, as shown in Fig. i, and is supplied with a fast and loose pulley, b b, and ahand-wheel, d. Secured to or forming part of this shaft is a cam, f, having, in the present instance, three projections, which act on one end of a lever, g, hung at the top of an adjustable bar, G, which is adapted to slide in ways forming part of the frame 13. The other end of the lever g rests in a recess formed in the back of the plunger H, which slides in the head E. A chisel-holder, H, is secured to the plunger bya set-screw, and the chisel or cuttingtool h is secured to the holder by another set-screw in the usual manner.

Between the plunger H and a yoke, c, on the head E, is a spring, I, in the present instance formed of rubber and adjusted by a set-screw, i, passing through the yoke c. This spring I tends to keep the chisel down on the work, and the tappet f, acting on the lever g, to raise the holder up, and when the lever g is released the compressed spring drives the chisel down, thus cutting the teeth on the file. The power of the blow, or rather the fall of the chisel, is regulated through the medium of a lever, .T, Fig. 3, which is pivoted on a projection, j, on the frame, the opposite end being provided with ahandled set-screw, j, resting on an adjustable plate, K, secured to the bed A of the machine. A pin, 9, projecting from the bar G, Fig. 4, rests on the lever J, and by raising or lowering this lever by the set-screw j the bar G and lever g are raised or lowered. This allows more or less play between the top of the lever g and the top of the recess in the plunger, so that by raising the bar G to the highest point the chisel will have the full extent of throw, and by allowing the bar G to be depressed to its lowest point the chisel will be hardly raised above the work-plate. This delicate adjustment can be done while the machine is running, and thus it will be seen that a file having a very fine brittle point can be cut and graduated as easily as a coarse file.

The bar G may be adj usted vertically by other devices than that described above-as, for instance, by a handled screw, (shown by dotted lines in Fig. 4;) or a wedge-shaped block may be so adjusted under the bar G as to accomplish the same purpose.

The feeding mechanism for traveling the file-blank under the chisel is constructed as follows: Adapted to suitable ways in the bed A is a carriage, D, on which the blank to be out is secured. In the present instance the ways are semicircular, in order that the carriage, which is also semicircular, will adjust itself to the chisel. To one end of the carriage l) is secured a feed-plate, K, preferably of metal, and in the present instance secured to the carriage by two clamp-plates, k is, which are clamped over the head of a bolt, k secured to the carriage, the plate being grooved at the end to receive projections on the clamp-plates 7c (See Fig. 6.) Between these clamp-plates and the carriage is a rubber disk, It", to take up any lost motion and prevent backlash. This joint allows the free adjustment of the carriage to the chisel, as described above. The feed-plate K passes between two friction feed-rollers, M and N, the roller M having its bearings in a bracket, P, secured to the base A, and the roller N having its bearings in a frame, P, hinged to the bracket at 1). Between projections m m on the bracket and frame are two springs, Q, for pressing the rollers against the plate K. The springs are in the present instance of rubber, and regulated by set-screws in the usual manner. A lever, B, pivoted to the frame B at q, and, having two arms, 7 r, is operated from a treadle, S, through the medium of a rod,T, secured to the arm r. A shaft, 11, Fig. 5, has its bearings in the frame P, and has an arm, 11., Figs. 1 and 7, and cam n at the opposite end, Fig. 5, acting on a rod, n resting on a projection secured to the bracket P. The arm n is acted upon by the arm 1"0f the lever B. aset-screw, ribeing provided on the arm a to determine the amount of lift to be imparted to the frame P. Secured to a projection on the lever B is the presser-foot s, which can be adjusted by the set-screw s. This presser-foot holds the fileblank down while the chisel is cutting. The rollers are geared to the driving-shaft iuthe following manner: tis a belt-wheel,over which passes a belt, a, to a wheel, t, on a shaft, U, having its bearings in a projection on the bracket P. The belt is tightened or loosened by an adjustable idler, 1,, on a stud projecting from a bracket secured to the frame. The wheels 16 t are removable, and wheels of different diameters may be placed on the shaft in their stead, in order to change the speed of the feed-rollers. On the shaft U is a worm, u, gearing with a worm'wheel, a", attached to the shaft of the lower feed-roll, M. which is geared to the upper feed-roller, N, by spurgears a at the opposite ends of the rollers. A

weight, V, is attached by a cord, 1;, to the outer end of the feed-plate K,the cord passing over a roller, 1;, secured to the bracket P. This weight returns the carriage to its original position as soon as the feed-rollers M and. N are separated by the lever B, thus freeing the feed-plate K. An adjustable stop, o,secured to the feed-plate K,regulates the return travel of the carriage. The file-blank is secured to the carriage D by inserting the tang of the blank in a recess in a plate, d, secured to the carriage, the shoulders resting against pins (1 on the carriage, as shown in Fig. 7. A handle, d, at the rear of the carriage D is for the purpose of turning the carriage at an angle to bell-crank lever Y, and link 1, which is secured to a collar, y, on the rod W, while a spring, 00, on the rod between the said collar and one of its bearings tends to keep the shaft out, with the belt on the loose pulley Z). The treadle is pivoted at z, and has a weight, Z, at the outer end of the arm 2. Each rod T and X is slotted at its lower end, and a bolt, 3 passes through the slots and through the arm c of the treadle, for the purpose of allowing the free movement of the treadle a certain distance, which will be fully described hereinafter.

The operation of the machine is as follows: A file-blank is placed on the carriage D,which is in the position shown in Fig. 1. the presser foot 8 bearing on the blank. When the machine is at rest, the attendant presses the arm 2 of the treadle down, the belt being on the loose pulley. A file-blank is placed in position on the carriage D. The treadle is then released sufficiently to allow the presser-foot to press on the blank, and the feed-rollers to clamp the feed-plate. Then the machine is ready to be started, and by releasing the treadle the weight Z shifts the driving-belt onto the fast pulley, and the rolls are set in motion simultaneously with the plunger. When the blank is cut, the treadle S is pressed down, first shifting the belt, and then releasing the feed-plate and file-blank. The cut file-blank is then removed and another blank inserted in its stead.

Owing to the use of friction feedrollers, which have a continuous motion to draw the carriage forward with the file-blank under the reciprocating cutter, in place of the usual intermittent feed motion, the teeth of the file will be cut more truly and in more correct shape, for, when the chisel comes in contact with the face of the file-blank, the latter will be momentarily retained thereby, but allowed to move forward again the instant the chisel rises, this momentary retention being permitted by the slight slip of the feed-plate K be tween the continuously-rotating friction-rollers.

I claim as my invention 1. The combination of the frame and. chisel of a file-cutting machine with a feed-plate and continuously-revolving frictional feed-rollers, substantially as described.

2. The combination of the frame and chisel of a file-cutting machine with a carriage and feed-plate secured to the carriage by a swiveljoint, as set forth.

3. The combination of the frame and chisel of a file-cutting machine with afeed-plate and feed-rolls, one being adjustable, as and for the purpose set forth.

4. The combination of the frame and chisel 5 of a file-cutting machine with a feed-plate and feed-rolls, one of which is adjustable, and a weight, V, substantially as describcd.

5. The feed-plate of a file-cutting machine having an adjustable step, as set forth.

In 6. The combination of the frame and cutter of a file-cutting machine, the feed-plate, friction-rolls and frame 1?, shaft at, having eccentric n, and mechanism for operating the shaft n to raise and lower the frame 1?, substantially as described.

7. The combination of the frame and cutter of a file-cutting machine, the feed-plate, feedrolls, frame 1?, shaft 'n, eccentric a, arm a, le-

ver R, rod T, and treadle S, as set forth. S. The combination of the levers R and a and set-screws 1*, as set forth.

9. The combination, inafile-cuting machine, of the driving-shaft F, pulley t, shaft U, pulley t, eonnectingbelt a, worm a, worm-wheel a,

2 5 lower and upper feed-rolls, M N, and gears 11.

a, as set forth.

10. In a fi1e-cutting machine, the frame A, having a bracket, P, carrying the lower feedroll, M, the frame P, hinged to the bracket 1? and carrying theupper feed-1e11, IT, and mechanism for raising and lowering said frame 1?, as set forth.

11. In a file-cutting machine, the frame A, having a bracket, 1?, carrying a feed-roll, M,

y the frame 1?, ivoted to thebraeket and carrying a feed-roll, N, arms m m on the bracket and frame, and spring or springs Q, and mechanism for raising the frame 1?, substantially as de scribed.

12. The combination of the frame and cutter 0 of a file-cutting machine with feed-rollers and feed-plate secured to the carriage, and handle (1 substantially as described.

13. The combination of the frame and shaft F of a fileeutting machine with a tool-ear- 5 rier, an adjustable bar, G, lever g, one end of which is operated on by a cam on the shaft F, the other end adapted to lift the tool-carrier, substantially as described.

14. The combination of the frame and shaft F of a file-machine with a vertically-adjustable bar, G, lever g, a cam, f, on the shaft, the plunger H, recessed to receive an arm of the lever g, as set forth.

15. The combination of the frame and shaft 5 5 F of a file-cutting machine with a bar, G, having a lever, g, one end of which is operated by a cam, f, the other end acting on the toolcarrier H, a lever, J, pivoted to the frame, and adjusting-screw j, as set forth. 6o

16. The combination of the driving and feed mechanism of a filecutting machine, the treadle S, rods T X, slotted, substantially as described, andleversRandY,forraisingthefriction-wheel N and shifting the driving-belt, all arranged and operated substantially as described.

In testimony whereof Ihave signed my name to this specification in the presence of two subscribing Witnesses.

HENRY A. FOSS.

\Vitnesses:

HARRY SMITH, HENRY lfowson.

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